ML17055B309
| ML17055B309 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 02/24/1986 |
| From: | Haughey M Office of Nuclear Reactor Regulation |
| To: | Hooten B NIAGARA MOHAWK POWER CORP. |
| References | |
| NUDOCS 8603030518 | |
| Download: ML17055B309 (4) | |
Text
February 24, 1986 Docket No. 50-410 Mr. B.
G. Hooten Executive Director for Nuclear Operations Niagara Mohawk Power Corporation 300 Erie Boulevard West
- Syracuse, New York 13202
Dear Nr. Hooten:
Subject:
Reports on PRA Insights DI BUTION'cketNo. 50-410 NRC PDR Local PDR BWD-3 r/f EAdensam EHylton MHaughey RBernero
- Attorney, OELD EJordan BGrimes JPartl ow ACRS (10)
Enclosed are two draft reports concerning technical insights gained from Probabilistic Risk Assessments (PRAs).
These reports are the outcome of an on-going effort to make available and utilize in numerous technical and managerial activities the information in probabilistic risk assessments regarding the factors which dominate the risk associated with nuclear power plants.
This effort includes identification of the features of design or operational practices which have been found to be important to safety in the types of plants which have been subjected to risk assessments.
In addition, the section on insights into PRA method focuses on areas which are sensitive to the results and the overall perception of plant weaknesses and vulnerabilities.
In particular, these reports contain discussions of:
general insights on plant strengths and weaknesses gained from PRAs; the contribution to core melt frequency from classes of sequences induced by various initiating events; modifi-
- cations, both hardware and procedural, which have been implemented to address problems identified in the conduct or as a result of PRAs; insights into PRA methodologies; and the contribution to measures of risk (core melt frequency and consequences of radioactive releases) from systems, components and events.
These reports will be published in their final forms in approximately two months.
These reports are being provided to you, as well as all other licensees, in advance of formal publication for your information. If, after reviewing these
- reports, you wish to provide comments to the staff, please provide them by March 25, 1986.
Sincerely,
Enclosures:
As stated
/S/
Nary Haughey, Project Manager BWR Project Directorate No.
3 Division of BWR Licensing cc:
See next page BWD-3-.D NHaughey/hmc 2'/86 Bb030305i8 Bb0224 PDR ADOCH, 050004i0 PDR D:
D
- DBL EA sam 2/~
86
II I
I II
'I T
C
~l IT I'
l1 I
I I I
lf
Mr. B.
G. Hooten Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Unit 2 CC:
Mr. Troy B. Conner, Jr.,
Esq.
Conner 5 Wetterhahn Suite 1050 1747 Pennsylvania
- Avenue, N.W.
Washington, D.C.
20006 Richard Goldsmith Syracuse University College of Law E. I. White Hall Campus
- Syracuse, New York 12223 Ezra I. Bialik Assistant Attorney General Environmental Protection Bureau New York State Department of Law 2 World Trade Center New York, New York 10047 Resident Inspector Nine Mile Point Nuclear Power Station P. 0.
Box 99
- Lycoming, New York 13093 Mr. John W. Keib, Esq.
Niagara Mohawk Power Corporation 300 Erie Boulevard West
- Syracuse, New York 13202 Mr. James Linvilie U. S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Norman Rademacher, Licensing Niagara Mohawk Power Corporation 300 Erie Boulevard West
- Syracuse, New York 13202 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue Kins of Prussia, Pennsylvania 19406 Mr. Paul D.
Eddy New York State Public Service Comnission Nine Mile Point Nuclear Station-Unit II Post Office Box 63
- Lycoming, New York 13093 Don Hill Niagara Mohawk Power Corporation Suite 550 4520 East West HighWay
- Bethesda, Maryland 20814
r,